Prehistoric cultural affiliation(s) include Late Prehistoric and Algonkian dating back to 1000.
The famous person Amon Dr. Ortman is associated with one of more of the McCook County historic places.
Some of the country's most noteable architects helped create the McCook County places including Barnhart Construction Co., Standard Bridge Company, Dakota Engineering Co., Huron Construction Co., Henry Kuhle, unknown, Kings & Dixon, Weber Bernard and Johnston Brothers. Prominent architectural styles found in McCook Country are Art Deco, Early Commercial and Gothic Revival.